javascript not equal to null

1 Why should you judge?Some students may see this title will be puzzled, why we have to determine whether the two variables in JavaScript is equal, JavaScript is not already provided with the double equals "= =" and the three equals "= = =" To us

I. The role of JavaScript "= =" 1. When the content on either side of = = is a string, the contents of the string are compared to equal.2. When the content on both sides of = = is a number, compare the size of the number is equal.3. When the

Determine whether two variables are equalProgramVery important computation in design. This operation is quite simple when processing the original value, but it is a little complicated to design the object. Javascript provides two sets of operators

An equal sign is the function of assigning values. The main problem is the difference between two and three equal signs. Many friends may not know it, there is a good example in this article, which mainly describes the differences between the two.

In JavaScript, the equal sign is represented by the double equal sign (). if and only when the two operations are equal, it returns true. Today, we will discuss in detail the problem of the equal sign operator, and attach an analysis of the

In JavaScript, the equal sign is represented by the double equal sign (). if and only when the two operations are equal, it returns true. Today, we will discuss in detail the problem of the equal sign operator, and attach an analysis of the

What is the difference between = (equal to) and = (all equal to) in JavaScript? Let's take a look at two examples: VaR n = '20140901 '; If (n = 100) { Alert ('equals '); } Else { Alert ('not equal '); } The result is "equal ";

What is the difference between = (equal to) and = (all equal to) in Javascript?Let's take a look at two examples: Var n = '20140901 '; If (n = 100) { Alert ('equals '); } Else { Alert ('not equal '); } The result is "equal "; When determining

What is the difference between = (equal to) and = (all equal to) in Javascript? Let's take a look at two examples: Var n = '20140901 '; If (n = 100) { Alert ('equals '); } Else { Alert ('not equal '); } The result is "equal "; When

False, zero, null, undefined, and empty string objects in Javascript In Javascript, We often come into contact with the five special objects mentioned in the question -- false, 0, empty string, NullAnd undefined. These objects are easy to use